The story
Shortening of the IUPAC name 4-amino-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one, taking the first syllables of amino, pyrazol-, and -one.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A metabolite of aminopyrine with analgesic, anti-inflammatory, and antipyretic properties. Full definition →
Shortening of the IUPAC name 4-amino-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one, taking the first syllables of amino, pyrazol-, and -one.
Etymology from Wiktionary, CC BY-SA 4.0.